This is a vintage Dad's Root Beer glass mug with a barrel-style design. The mug is made of heavy, thick glass and stands over 5.25 inches tall.  Diameter is 3" not including the handle.  It has embossed letters with the word "Dad's" on both sides.  It is clear in color and holds 12 ounces. The mug is an original piece and was manufactured in the United States. It has a soda theme and is a collectible advertising item. A gift idea for Father's Day.